Process for recovering hydroprocessed hydrocarbons with two strippers and common overhead recovery

Abstract

A process is disclosed for recovering hydroprocessing effluent from a hydroprocessing unit utilizing a hot stripper and a cold stripper. The cold stripper and the hot stripper utilize a common overhead recovery apparatus.

The invention claimed is: 
     
       1. A hydroprocessing process comprising:
 hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide hydroprocessing effluent stream; 
 stripping a relatively cold hydroprocessing effluent stream with a stripping media in a cold stripper to provide a cold stripped stream and a cold vapor stream; 
 feeding the cold stripped stream to a product fractionation column; 
 stripping a relatively hot hydroprocessing effluent stream with stripping media in a hot stripper to provide a hot stripped stream and a hot vapor stream; 
 feeding the hot stripped stream to said product fractionation column; 
 preventing material from the hot stripper from mixing with material from the cold stripper by means of a barrier; and 
 condensing said cold vapor stream and said hot vapor stream in a condenser to provide a condensed overhead stream. 
 
     
     
       2. The hydroprocessing process of  claim 1  further comprising separating said condensed overhead stream into an off-gas stream and a condensed receiver bottoms stream in an overhead receiver. 
     
     
       3. The hydroprocessing process of  claim 2  further comprising refluxing at least a portion of said condensed receiver bottoms stream to said hot stripper. 
     
     
       4. The hydroprocessing process of  claim 2  further comprising refluxing at least a portion of said condensed receiver bottoms stream to said cold stripper. 
     
     
       5. The hydroprocessing process of  claim 1  further comprising mixing vapor from said cold stripper and vapor from said hot stripper in a common overhead section. 
     
     
       6. The hydroprocessing process of  claim 1  further comprising isolating a cold stripped bottom stream of said cold stripper from a hot stripped bottom stream of said hot stripper. 
     
     
       7. The hydroprocessing process of  claim 1  further comprising supplying a cold stripping media to said cold stripper and supplying a hot stripping media to said hot stripper. 
     
     
       8. The hydroprocessing process of  claim 1  further comprising a fractionating said cold stripped stream and said hot stripped stream to provide product streams. 
     
     
       9. A hydroprocessing product recovery process for recovering product from a cold hydroprocessing effluent stream and a hot hydroprocessing effluent stream comprising:
 stripping a relatively cold hydroprocessing effluent stream with a stripping media in a cold stripper to provide a cold stripped stream and a cold vapor stream; 
 stripping a relatively hot hydroprocessing effluent stream with stripping media in a hot stripper to provide a hot stripped stream and a hot vapor stream; 
 preventing material from the hot stripper from mixing with material from the cold stripper by means of a barrier; 
 condensing said cold vapor stream and said hot vapor stream in a condenser to provide a condensed overhead stream; and 
 fractionating the cold stripped stream and the hot stripped stream to provide product streams. 
 
     
     
       10. The hydroprocessing product recovery process of  claim 9  further comprising separating said condensed overhead stream into an off-gas stream and a condensed receiver bottoms stream in an overhead receiver. 
     
     
       11. The hydroprocessing product recovery process of  claim 10  further comprising refluxing at least a portion of said condensed receiver bottoms stream to said hot stripper. 
     
     
       12. The hydroprocessing product recovery process of  claim 10  further comprising refluxing at least a portion of said condensed receiver bottoms stream to said cold stripper. 
     
     
       13. The hydroprocessing product recovery process of  claim 9  further comprising mixing vapor from said cold stripper and vapor from said hot stripper in a common overhead section. 
     
     
       14. The hydroprocessing product recovery process of  claim 9  further comprising isolating a cold stripped bottoms line of said cold stripper from a hot stripped bottoms line of said hot stripper. 
     
     
       15. The hydroprocessing product recovery process of  claim 9  further comprising supplying a cold stripping media to said cold stripper and supplying a hot stripping media to said hot stripper. 
     
     
       16. A hydroprocessing process comprising:
 hydroprocessing a hydrocarbon feed in a hydroprocessing reactor to provide hydroprocessing effluent stream; 
 stripping a relatively cold hydroprocessing effluent stream with a stripping media in a cold stripper to provide a cold stripped stream and a cold vapor stream; 
 stripping a relatively hot hydroprocessing effluent stream with stripping media in a hot stripper to provide a hot stripped stream and a hot vapor stream; 
 preventing material from the hot stripper from mixing with material from the cold stripper by means of a barrier; and 
 separating a portion of said cold vapor stream in an overhead line from an overhead section of said cold stripper and said hot vapor stream in an overhead line from an overhead section of said hot stripper into an off-gas stream and a receiver bottoms stream in a common overhead receiver. 
 
     
     
       17. The hydroprocessing process of  claim 16  further comprising condensing said cold vapor stream and said hot vapor stream in a condenser to provide a condensed overhead stream. 
     
     
       18. The hydroprocessing process of  claim 17  further comprising feeding said condensed overhead stream to said overhead receiver. 
     
     
       19. The hydroprocessing process of  claim 17  further comprising refluxing at least a portion of said condensed receiver bottoms stream to said cold stripper and to said hot stripper. 
     
     
       20. The hydroprocessing process of  claim 16  further comprising mixing vapor from said cold stripper and vapor from said hot stripper in a common overhead section.